Hydraulic jack.



H. UORDELL.

HYDRAULIU JACK.

APPLIoATroN FILED MAR. 12. 1912.

Pat-,ema July 16, 1912.

witnesses cttoruegs H. GORDELL.

HYDRAULIC JACK. APPLIOATION FILED 111111.12, 1912.

1,032,993.` Patented Ju1y16,1912.

2 SHEETS-SHEET 2.

A' Snvcntor attorneys communicates with iignrriln s'TVATiisrATENT critica.I

HENR CORDELL, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-'ALF 'rowcHAaLEs COBDELLJ, OF RUBY, MONTANA. c

HYDRAULIC JACK.

Specification of Letters Patent.

This invention relates to hydraulic jacks and has Jfor an object to provide a Jack of the kind embodying new and improved teatures ot convenience, reliability and strength.

A further object of the invention isto provide improved means for forcing the liquid from the reservoir to the cylinder and improved means tor permitting the return of. -the liquid from the cylinder to the reservoir.

lVith these and other objects in view the invention comprises certain novel constructions, combinations and arrangement of parts as will be hereinafter more fully described and claimed.

In the drawings :-Figure 1` is a longitudi'-,

iml diametrical sectional view of the improved jack. Fio. 2 is an end view,ot` the jack as indicatedzby arrow .2 of Fig. 1. Fig. 3 is a rsectional detail view of the passage from the cylinder to the reservoir and the controlling means'. Fig. 4 is a detail view orn the oriticed screw at the passage from the reservoir to the cylinder. Like characters of reference indicate corresponding parts throughout the several views. l

rlhe body of the improved jack comprises a preferably integral structure embodying the reservoir 10 and l voir 10 is provided with a screw head`12 with acscrewrcap 13 for the introduction of the liquid under ordinary conditions. Between the reservoir 10 and cylinder 11 `a smaller cylinder 14 is located in which recprocates a plunger 15 carrying. a packing 16 at its lower end. The cylinder 14 communicates with the reservoir 10. 'througha passage 17 controlled by a valve 18 and also the large cylinder 1 1 through a passage 19 controlled by a valve 20. The valve 20 is held in position by -a screw 21shown in end elevation at Fig. 4, orificed as at 22 to permit the passage of cylinder 11. rlhe reserf) fluid into the large' cylinder 11 and serving Patented July 16, 1912. Application led March 12, 1912. Serial No. 683,869. l

also to maintain a spring 2'3"-'in position to hold the valve 2Q yieldingly to seat. Within the large cylinder 11 a ram 24 is mounted to. reciprocate, carrying .at its inner end a packing 25 which forms a Huid-tight engagement with the walls of the cylinder 11.

To actuatethe plunger 15 a lever 26 is mounted upon the structure by means of a collar 27 rotatably mounted upon the block 28 held in such position rotatablyv by a.

screw'nut 29.l The lever 26 is connected with the collar 27 by means of a link '30 pivotedwto the collar as lever as at 32. y

In the diaphragm between the'reservoir 10 and large cylinder 11 'a socket 33 is formed communicating through the passage 34 with the large cylinder 11 and through the passage 35 at 31 and to the with the reservoir 10.A

Within .the socket 33 a valve 36 is located adapted to by. 1a screw close such passage and controlled 37 having an extremity 38 proportioned to engage-upon the head of the valve 36 and'hold it firmly to seat.

lln operation the jack is preferably employed with the reservoirv end upwardly and the ram 24 engaging upon a firm base. The

lever 26 is then turned by use of the collar l v27 to the most convenient location and is oscillated to. reciprocate lthe plunger 15.

Liquid from the reservoir 10 is thereby drawn through` the passage v17 and forced through the passage 19 into the large cylinder 11 and by reason of the greater area of they ram 24 the force applied to the lever 26 is multiplied in the well known manner.

When it is desired to return the plunger to position the screw 37 is loosened to unseat the valve 36 and the weight ot'. the device orces the liquid through thepassages 34- and '35 into the reservoir'. lt thev jack can be removedv from the position infwhich it is employed in lifting it will\ be found advantageous to invert the jack standing it with the reservoir end downwardly and force the plunger to seat manually.

claim 1. Ina hydraulic jack, an integral body I the reservoiran rcylinder within the Jdiaphragm adapted `t`o 110 reservoir and force it phragm in` the body separating the reservoir and cylinder, a ram located to reeipro cate in the cylinder, a yplunger mounted to reciprocate within the diaphragm between thel reservoir and cylinder and adapted to draw liquid from the reservoir and force it into 4the cylinder, a lever for actuating the plunger, and means permitting the rotation ofthe lever around the plunger as aA Center. n A

3. ln a hydraulic jack, anintegral body Comprising a reservoir at one end and a Loeaeoa- Cylinder at the opposite end separated By a diaphragm and with passage communicating through the diaphragm between the reservoir and cylinder, valves located in Jthe passage, a plunger mounted within'the da phragm communicating.- with the passage and adapted to draw liquidfrom thereservoirinto the passage and force it Afrom the passage into the cylinder, and a lever ro tatably mounted to aetuate the plunger.

ln testimony whereof l alix my signature in presence of twol witnesses. Y

HENRY l(donnent. 

